In the annals of boxing blunders—and the exploits of Mike Tyson have made those some very thick books indeed—you may be unlikely to find an act so brazen and stupid as what Dereck Chisora did today in Munich at the weigh-in for his WBC heavyweight title fight against Vitali Klitschko. »2/17/12 12:15pm 2/17/12 12:15pm